Analyses and optimisation of ADSL/VDSL lines using ericsson APM system - comparing results of two operators

In this article we explain approach in using Access Performance Manager System (APM) for analyses of ADSL lines in production of broadband (BB) Operator. Results of monitoring and optimization are shown. In our case optimization is done by DAO subsystem. We compare results of two Operators with the same goal to maximize service availability with minimum decrease of service characteristics, specially speed in downstream. APM has purpose for monitoring of all performances of BB system as well as interdependency of lines. APM monitoring and optimization of line parameters is based on changing of End User Profiles and using line testing mechanism integrated in DSLAM devices. APM is designed around a selection of configurable batch jobs that store vital Line Test (SELT and Loop Diagnostic) and DSL-link parameters in the APM database. By selecting the appropriate view, it is possible to follow and understand faulty behaviour in detail. APM is also equipped with a real-time view that is essential when troubleshooting on a per-line basis or when re-configuring a DSL link online. Support for equipment/DSLAM of other vendors than Ericsson is also implemented in APM. APM offers several tools that are designed to solve different problems in a DSL-based network.